Electric-lamp fixture.



' A. C. MCWILLIAMS.

ELECTRIC LAMPAVFIX'TURE. APPLICATION FILED FEB. 24. 1912.

1,145,382.. Patented July 6, 1915.

ARTHUR c. mcwILLrAMsor CHICAGO, ILLINOIS.

ELECTRIC-LAMP FIXTURE.

I a Specification of Letters Patent. 1 Patented July 6,1915.

Application filed February 24, 1912. Serial No. 679,541.

To all whom it concern: I Be it known that I, ARTHUR C. MoWIL- LIAMs, a citizen of the United States, re-

siding at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Electric-Lamp Fixtures, ofwhich the following is a specification.

My invention relates to fixtures for incan-- stations, and the like; second, to provide means whereby the lamp socket and shade may be independently adjusted in a vertical direction to accommodate various sizes of lamps and various forms of shades.

I accomplish my objects by the mechanism illustrated in the accompanying drawings,

in whicha Figure 1 is a general elevation of the complete fixture shown in central vertical section. Figs. 2 and 3 are plan sectional views taken on the lines 22 and 33 respectlVly;

Similar reference characters, denote like parts in the different views.

The lamp 1 screws into a socket 2 in the ordinary manner. The socket in the form here shown is what is commercially termed a sign socket, being provided with ears 3, which have apertures extending in a direction parallel to the central axis of the socket. The supply conductors 4 lead in through. the dome of the socket to energize the same in the ordinary manner. Said supply conductors pass up through'the tube 5 to the source of supply, said tube being preferably crowned by a ceiling canopy 6.

The socket and lamp are supported by delicate spiral springs 10 which encircle screws 11 screwing into the disk 12 rigidly fastened to tube 5. Said springs rest upon a collar 13 which encircles the body of socket 2 and rests upon the heads of screws 11.

Encircling screws 1,1.-ab'ove the ears 3 are other spiral springs'15. backed up at the top nuts 16 upon said screws. hold the socket down and pregent undue re- ..c'oil in an upward direction. The tension or strain of both of the upper and lower springs maybe regulated by means of the Said springs nuts 16. Said nuts also serve an additional purpose, to-wit, they prevent the socket from 1 receding too far upward when a new lamp is being screwed into the socket.

The supply conductors 4 are given a few extra turns just above socket 2 to permit said socket to ride freely in a vertical direction, and from the foregoing description it will be apparent that the lamp socket and lamp will be cushioned against all vertical movement of the screws 11 which are rigidly secured to the tube 5 and hence -.vibrate in 'unison with the ceiling or whatever portion of the building forms the support. It is apparent also that the springs 10 are called upon to support merely the socket and lamp, the aggregate weight of which is small compared to the weight of the shade and-associ-- ated parts of the fixture. This is of great importance, for as the weight of the parts supported on the cushion springs is small it follows thatthe springs may be delicate enough to absorb all ordinary vertical move-v ments. In other words, by supporting the lamp and lampsocket separatelythecushioning sprlngs maybe made soft and hence willnot transmit to the lamp the vibrations which would be transmitted in case the cushioning spring or springs were of the stiffness required to support the additional weight .of the shade and shade holder.

The lamp shade 20 is supported by. an annular holder 21 resting upon the heads of screws 22-whieh screw into the interiorly threaded tubes '23 secured at their upper ends to the disk 12, above mentioned. By

preference, tubes 23 penetrate disk 12 and are rimmed over or expanded at-their up-- per ends to hold them securely in place, as shown at the left side of Fig. 1. 'Said disk and the parts supported thereby are preferably inclosed within a hood 25 which may assume various forms, in the present in stance having corrugated sides extending down and inclosing a portion of the shade holder and having an annular shoulder 26 adapted to rest upon'the outer edge of the horizontal rim of disk 12. No fastening means are necessary for saidhood although by preference a gasket or washer 27 is'provided at the upper end to prevent rattling.

From the above description it is clear not only that the lamp and shade are independently supported but also that they are independently adjustable in .a vertical direction,

' the vertical adjustment ofthe lamp socket being cheated by rotating screws 11 and the vertical adjustment of the shade and shade holder being efiected by rotating the screws 22. This renders the fixture practically universal, for the socket may be raised or lowered, to accommodate lamps of various sizes and the shade may be raised or lowered both to accommodate the various lamps and torender practical the employment of difterent sizes and shapes of shade. Furthermore, different users prefer difi'erent elevations of shade with respect to a lamp of given size, some persons preferring the shade to set low in order to confine the rays and others requiring it to set high in order to permit the rays to be difiused. With the outer hood formed in the manner shown it may be readily slipped up out of the way and thus afiord access to the "parts within. lit will be understood that While, for clearness, ll refer to the part 12 as a disk, a precisely circular outline is not necessary and the con-figuration of this element may be considerably varied without departing i from the scope of the term "nor from the spirit of the invention.

lit will be noted that in my construction when the lamp socket is adjusted vertically all parts of'thesock'et move in a straight line. llhis characteristic is important for it avoids the twisting of the conductor wires.

Having thus described my invention, what I claim. as new and desire to secure by Letters Patent is 1. An electric lamp fixture consisting of .a stationary-tube through which the lamp Wires areled, a shade holder supported from. v said tube, a lamp socket vertically movable 40 independently of said shade holder, and a spring interposed between said socket and said tube for yieldingly supporting said socket.

2. Anelectric lamp fixtures comprising a la-stationary support, a lamp socket, vertically arranged h elical springs for yieldingly sup- POItH'Lg SHJClSOGkQt, and vert cally arranged screws guidlng said socket and adapted to support said springs and. regulate the ver-- 0 tical position thereof, said screws screwing into said supportv 3.'An electric lamp fixturecomprising a stationary disk, a shade holder beneath said disk, means for vertically; adjusting said shade holder with respect to said disk, a 4

lamp socket independent of said shade holder, and a cushion support for said socket adapted to yieldingly prevent the vertical movement thereof in either direction, up or down. v

4. An electric lamp. fixturecomprising a stationary disk, a shade holder adjustably supported from said disk, a lamp socket beneath said disk adapted to move vertically independently of said disk and shade holder, and spring mechanism adapted to support the socket only, said spring mechanism being vertically adjustable with re- 'spe'ct to said shade holder. 5. An electric lamp fixture comprising two interscrewing parts, one of which is stationary, said parts being vertically arranged, a shade holder supported from one of said parts and being consequently vertically adjustable, a lamp socket vertically movable with respect to said shade holder, and means independent of said shade holder for yieldingly supporting said socket. 6. In an electrical lamp fixture, the combination of a stationary support, ashade holder supported thereon and beingu ertically adjustable, vertical screws screwing into said support, springs carried by said screws and being thereby vertically adjustable, and a lamp socket cushioned on said springs and guided thereby in a vertical direction.

7. An electric lamp fixture comprising a stationary disk, a shade holder, means for vertically adjusting said shade holder with respect to said disk, screws screwing into said disk, a collar sup .ported on said cled by said collar and movable independently thereof in a vertical direction, springs supported upon said collar and supporting" said socket, and other'springs resting upon said socket and backed up at the top by nuts upon said screws.

In Witness whereof, I have hereunto sub-' scribed my name in the presence of two Witnesses.

reruns e. McWllLLlAMS.

Witnesses:

HOWARD M. Cox, MARGARET D. Rom? Copies off this patent may beobtaincd for five cents'each, by addressing the Commissioner of Eatents,

' Washington, G.

screws, a lamp socket encir-' Bil vertically arranged 

